| 摘要 |
PROBLEM TO BE SOLVED: To provide a drain member for having sufficient strength and securing sufficient voids even when using a recycled article as a raw material, and to provide its manufacturing method. SOLUTION: The drain member charges the raw material consisting of the recycled article of a thermoplastic resin in an extrusion vessel forming a plurality of extrusion holes at a plurality of concentrically circular positions on an extrusion face, extrudes the extrusion raw material from the extrusion holes, and welds a plurality of string-like extrusion materials 18 and 19 at mutual contact points to be wholly molded into prescribed shape. In the extrusion hole, the diameter of the extrusion hole of three 3-equally arranged positions on the same circle is larger than that of the extrusion hole of the other position, and the three thick extrusion materials 19 are core materials. COPYRIGHT: (C)2005,JPO&NCIPI |
